| 小麦－玉米轮作期土壤排放N2O通量及总量估算 |
| 摘要点击 1343 全文点击 964 投稿时间：1994-05-15 |
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| 中文关键词 氧化亚氮 排放总量 小麦－玉米轮作 土壤 |
| 英文关键词 N2O flux emission environmental factor |
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| 中文摘要 |
| 对小麦-玉米轮作期周年的N2O通量进行了测定和总量估算,分析了N2O通量与土壤温度、地温、气温、降水和施氮量的关系。由实验获知,华北平原栾城农业生态系统实验站的农田N2O通量(N)为10.6-24.2μg/(m2·h),相应的全年排放总量(N)为0.93-2.11kg(hm2·a)。施用尿素的农田排放N2O量约占化肥施用量的0.54%,施用有机肥和化肥的农田排放N2O量占总施氮量的0.70%。 |
| 英文摘要 |
| Nitrous oxide fluxes from the fields in a wheat and maize rotation system were studied in the North China Plain from September 25,1992 to September 21,1993.The total emission of N2O was also estimated according to the fluxes of nitrous oxide measured in a year period. The fluxes of N2O are 10.6—24.2 μg N/(m2·h)with the correspondingly annual emission of 0.93—2.11 kg N/(hm2·a).The N2O emissions from ureafertilized and organic-fertilized plots account for about 0.54% and 0.70% of the amount of applied fertilizers,respectively. |
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